I have written about step-by-step post on how to get Dropbox "Copy Public Link" works on Thunar File Manager. I have foundeasier way to do that by installing Thunar Dropbox. Thunar Dropbox is a plugin for Thunar file manager which adds Dropbox context-menu.

Unfortunately, the plugin doesn't come with Dropbox itself and there is no PPA or any repository yet. So you have to download and compile it manually to get things done. So, please follow this guide to install Thunar Dropbox on your system. I assume that you have installed and configured Dropbox properly. Grab the ZIP archive of Thunar Dropbox here. Once downloaded, extract the file and open Terminal.

Installing dependencies

sudo apt-get install libthunarx-2-dev

Now, it's time to compile Thunar Dropbox:

./waf configure --prefix=/usr

./waf build

sudo ./waf install

Thunar Dropbox uses Python 2 as its interpreter. So, please make sure to use Python 2 when compiling.

Once installed, login and log out back in order to change to takes effect.

This plugin has been tested on Xubuntu 12.10 Quantal Quetzal and everything looks well :)